On Tue, 16 Feb 2016, Keith Moore wrote:
It's not dead. I'm still working on it and will try to get a revision out this coming weekend.Sadly Keith Moore's addrquery draft seems to have stalled: https://tools.ietf.org/html/draft-moore-email-addrquery-01 I agree that was a promising direction... Yes I quibbled over the details, but certainly not with the intention of blocking it, rather I wanted it to be more realistically deployable...
Unfortunately, the draft is useless for end-to-end encryption, as it relies on a clean path from the client to the recipient's SMTP server which is frequently blocked by ISP's and could be blocked more in the future to prevent end-to-end encryption using this new RRTYPE. This was explained in various discussions on the DANE list. Paul